<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单</title>
    <script src="https://cdn.jsdelivr.net/npm/vue"></script>
</head>
<body>
<div id="app">
    <select v-model="selected" name="fruit">
        <option value="">选择一个网站</option>
        <option value="www.runoob.com">Runoob</option>
        <option value="www.google.com">Google</option>
    </select>

    <div id="output">
        选择的网站是: {{selected}}
    </div>
</div>

<script>
    new Vue({
        el: '#app',
        data: {
            selected: ''
        }
    })

</script>
</body>
</html>